from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu

# 127.0.0.1:5000/news/1
from info.utils.captcha.response_code import RET
from info.utils.common import user_login_data


@news_blu.route('/followed_user', methods=['POST'])
@user_login_data
def followed_user():
    # 取到自己的登陆信息
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    """关注或者取消关注用户"""
    # 取参数
    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        other = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据库失败")

    if not other:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    if action == 'follow':
        if other not in user.followed:
            # 当前关注的用户列表添加一个值
            user.followed.append(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户已被关注")
    else:
        # 取消关注
        if other in user.followed:
            user.followed.remove(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户未被关注")

    return jsonify(errno=RET.OK, errmsg="操作成功")


@news_blu.route('/comment_like', methods=['POST'])
@user_login_data
def comment_like():
    """
    评论点赞
    :return:
    """
    # 1.判断登陆
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')
    # 2.获取参数
    comment_id = request.json.get('comment_id')  # 新闻的id
    # news_id = request.json.get('news_id')  # 用户评论的内容
    action = request.json.get('action')  # 用户回复的评论

    # 3.校验参数
    if not all([comment_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if action not in (['add', 'remove']):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        comment_id = int(comment_id)
        # news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据库查询错误')

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg='评论不存在')

    if action == 'add':
        comment_like_model = Comment.query.filter(CommentLike.user_id == user.id,
                                                  CommentLike.comment_id == comment.id).first()
        if not comment_like_model:
            comment_like_model = CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id
            db.session.add(comment_like_model)

    else:
        # 取消点赞评论
        comment_like_model = Comment.query.filter(CommentLike.user_id == user.id,
                                                  CommentLike.comment_id == comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)

    try:
        # 点赞评论
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return  jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/news_comment', methods=['POST'])
@user_login_data
def comment_news():
    """
    评论新闻或者回复某条新闻下的评论
    :return:
    """
    # 1.判断登陆
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')
    # 2.获取参数
    news_id = request.json.get('news_id')  # 新闻的id
    comment_content = request.json.get('comment')  # 用户评论的内容
    parent_id = request.json.get('parent_id')  # 用户回复的评论

    # 3.校验参数
    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    # 查询新闻, 并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.DBERR, errmsg='数据查询错误')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到新闻数据')
    # 初始化一个评论模型, 并且赋值
    comment = Comment()
    comment.news_id = news_id
    comment.user_id = user.id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    # 添加到数据库
    # 为什么要自己去commit()呢 因为在return的时候需要用到comment的id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg='ok', data=comment.to_dict())


@news_blu.route('/news_collect', methods=['POST'])
@user_login_data
def collect_news():
    """
    收藏新闻:
    1.获取参数
    2.校验参数
    3.查询新闻,并判断新闻是否存在
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')

    # 1.接受参数
    news_id = request.json.get('news_id')
    action = request.json.get('action')

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if action not in (['collect', 'cancel_collect']):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    # 2.判断参数
    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    # 3. 查询新闻, 并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.DBERR, errmsg='数据查询错误')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到新闻数据')
    # 4.收藏
    if action == 'cancel_collect':
        # 取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        # 收藏
        if news not in user.collection_news:
            # 添加到用户的收藏列表
            user.collection_news.append(news)

    return jsonify(errno=RET.OK, errmsg='操作成功')


@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    """新闻详情"""

    # 显示用户是否登陆逻辑
    # 取到用户id
    user = g.user

    # 右侧的新闻排行逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    # 定义一个空的字典列表,里面装的就是字典
    news_list_dict = []
    # 遍历对象列表 将对象的字典添加到字典列表里面去
    for news in news_list:
        news_list_dict.append(news.to_basic_dict())

    # 查询新闻数据
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)
    # 更新新闻的点击次数
    news.clicks += 1
    # 是否是收藏
    is_collected = False

    # if 用户已登陆:
    #     判断用户是否收藏当前新闻,如果收藏:
    #         is_collected

    if user:
        # 判断用户是否收藏当前新闻,如果是
        # collection_news后面可以不用加all,因为sqlalchemy会在要使用的时候自动加载
        if news in user.collection_news:
            is_collected = True

    # 去查询评论数据
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
    comment_like_ids = []
    if g.user:
        try:
            # 需求:查询当前用户在当前新闻中都点赞了哪些评论
            # 1.查询当前新闻的所有评论
            comment_ids = [comment.id for comment in comments]
            # 2.在查询当前评论中哪些评论被当前用户点赞
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id == g.user.id).all()
            # 3.取到所有被点赞的评论id
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict['is_like'] = False
        # 判断当前遍历到的评论是否
        if comment.id in comment_like_ids:
            comment_dict['is_like'] = False
        comment_dict_li.append(comment_dict)

    is_followed = False
    # 如果当前新闻有作者 并且当前登陆用户已关注过作者
    if news.user and user:
        # 判断用户是否有关注作者
        if news.user in user.followed:
            is_followed = True

    data = {
        'news_list_dict': news_list_dict,
        'user': user.to_dict() if user else None,
        'news': news.to_dict(),
        'is_collected': is_collected,
        'is_followed': is_followed,
        'comments': comment_dict_li
    }

    return render_template('news/detail.html', data=data)
